一個在 CORBA 環境上的物件異動服務系統

Abstract

近年來，物件導向的技術日漸成熟，而它所帶來的優點也廣泛的被接受。 如何將物件導向的觀念引入主從計算（Client/Server Computing）的領 域也成了相當有趣的研究方向。在這方面 OMG（Object Management Group）一直扮演著推動者的角色，並在 1990 年提出了一個分散式物件 計算環境的標準 CORBA（Common Object Request Broker Architecture ），目前是在這個領域最受業界重視的標準。CORBA 提供了分散式環境上 物件溝通的基礎，而本篇論文即在這個基礎上建構了一個物件異動服務（ Object Transaction Service），使得一般的應用程式設計者能透過繼承 ，以更高階的方式實作出即使在錯誤發生的情況下亦能確保資料更新一致 性的應用軟體。 If we take a look at the recent trend of the client/server computing technology, we will find the distributed object technology is ready to take off. The OMG(Object Management Group), a consortium of object venders, specifies a standard, called CORBA(Common Object Request Broker), in the fall of 1990 to envision a common interconnection bus for distributed objects. CORBA is also the most widely accepted standard in this field and there are many CORBA implementations available now. Moreover, the concept of transaction is the key to ensure the reliability and availability of client/server applications. In this thesis we provide an Object Transaction Service based on the CORBA architecture. It takes the advantages of object- oriented programming to help programmers to implement their transactional applications in a much easier way. In late 1994, the OMG also published an object transaction service, we adopt this specification as the blue print of our work.